https://www.t7mel.co
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
89
GRADE
B
FIX
0
REVIEW
3
PASS
4
INFO
1
Checks
84 PASS 3 REVIEW
CTransfer EfficiencyAction62% efficientREVIEW
Transfer Efficiency
Action62% efficient
62% efficient
Warning::
Transfer efficiency: 62%
An estimated 187 KB (38%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 187 KB of unused JavaScript. This wasted data produces 0.04g of unnecessary CO2 per page view.
Total waste: 187 KB (38% of page weight)
Unused JS 187 KB
0.04g unnecessary CO2 per visit
Actual transfer 495 KB
Theoretical minimum 307 KB
Potential savings 187 KB (0.04g CO2)
See Deep Analysis sections above for specific optimizations.
BWeb Font Weight VariantsNo detectable Google Fonts weightsREVIEW
Web Font Weight Variants
No detectable Google Fonts weights
No detectable Google Fonts weights
Info::
No detectable Google Fonts weights
The analyzer detects font weights via Google Fonts URL parameters (~70% of font-using sites). Self-hosted fonts and non-Google CDN fonts aren't visible to URL-based detection. If you self-host fonts, manually audit how many @font-face weights you ship -- 2-3 weights per family is typically enough; 5+ is usually unused payload.
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
ActionWhether the site is served from green-energy infrastructure
Green Hosting
No green hosting detected
A+CO2 Per Page Load0.11g CO2 per viewPASS
CO2 Per Page Load
0.11g CO2 per view
0.11g CO2 per view
Info::
0.11g CO2 per page view
This page transfers 0.5 MB, producing an estimated 0.11g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.00g, network 0.02g, end-user device 0.09g.
Got: 0.11g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 13.7 kg CO2/year
With 10,000 page views per month, this page would generate approximately 13.7 kg of CO2 annually — equivalent to charging 1716 smartphones.
Info::
Green hosting reduces data center emissions
0.11g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 90% of websites
Sustainable Web Design model v4 · Page size: 0.5 MB
Your site
0.11g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.00g
Network
0.02g
End-user device
0.09g
At 10,000 monthly views: Monthly: 1.1 kg · Annual: 13.7 kg · ≈ 1716 smartphone charges
AGreen HostingGreen (cdn)PASS
Green Hosting
Green (cdn)
Green (cdn)
Info::
Cloudflare CDN uses renewable energy
Since most traffic is served through the CDN, the majority of data transfer energy is renewable.
Info::
Cloudflare: 100% renewable energy for global network since 2019
Info::
Green hosting status based on known provider commitments
Green hosting detection uses a curated database of provider renewable energy commitments. This is not a real-time verification. For authoritative checks, visit thegreenwebfoundation.org.
Green Hosting✓ Green Hosted
Hosting Not identified✗CDN Cloudflare✓
Cloudflare: 100% renewable energy for global network since 2019
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight94% cachedPASS
Repeat Visit Weight
94% cached
94% cached
Info::
94% reduction on repeat visits
Returning visitors download only 31 KB (vs 495 KB first visit). 48 of 50 resources are served from browser cache, saving 0.11g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.11g)
First visit
495 KB
Repeat visit
31 KB
94% reduction on repeat visits
Saving 0.11g CO2 per returning visitor
48 resources served from cache · 2 resources re-downloaded
A+Carbon Budget10th percentilePASS
Carbon Budget
10th percentile
10th percentile
Info::
0.11g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 90% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 10th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.11g
10th percentile
Cleaner than 90% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 81% cleaner ✓
vs Target 77% cleaner ✓
Image Optimization25 images, 5 KB total, 2 KB wastedINFO
Image Optimization
25 images, 5 KB total, 2 KB wasted
Image Optimization Audit
Total Images
25
Total Size
5 KB
Oversized
1
Wasted
2 KB
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.